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(No Model.) 3 Sheets-Sheet I.

' M. H.' RUMPF.

FABRIC CUIDING DEVICE FCR EMBROIDERINC MACHINES. No. 486,355. PatentedNov. 15, 1892.I

W/TNSSES effi/44 M (No Moaerl.) y 3 sheets-sheet@ M.- H.v RUMPP. FABRIGGUIDING DEVICE FORBMBROID'BRING MACHINES.

No. 486,355. Patented Nouv. v15, 1892.

W/ TNESSES (Ne Medel.) `3 sheets-#sheet s.

l M. H. RUMPF. FABRIC GUIDING DEVICE FOR EMBROIDERING MACHINES. Ne.486,355. Petented Nev. 15, 1892.

UNITED STATES PATENT OFFICE.

MARTIN HENRI RUMPF, OF PARIS, FRANCE.

FABRIC-GUIDING DEVICE FOR EMBROIDERING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 486,355, dated November15, 1892.

Application filed November 20, 1890. Serial No. 372,033. (No model.)

To all whom it may concern.:

Be it known that I, MARTIN HENRI RUMPF, manufacturer, acitizen of theUnited States of Brazil, and a resident of Paris, in the Republic ofFrance, have invented certain new and useful Improvements inEmbroidering Appliances, of which the following is a specification.

This invention relates to that class of apparatus employed mainly forembroidering by means of sewing-machines and comprises a guiding deviceintended to transmit to a fabric-holding frame a Inovement reproducingon the same scale or on a reduced scale the pattern to be embroidered.

This invention provides a simple and compact mechanism whereby amovement can be imparted to the said frame as extensive as may benecessary, and, finally, it enables the scale or proportion to which thepattern to be embroidered is to be reproduced to be exactlyregulated.InLetters PatentNo.4.64,442,

dated December 1, 1891, I have claimed the fabric-holding frame hereinshown and described.

My invention relates to an improved pantograph device; and myimprovements consist in novel features of construction hereinafterdescribed and claimed.

In the annexed drawings, Figure l is a plan of the whole apparatus. Fig.2 is atransverse section of the frame holding the fabric. Fig. 3 isalongitudinal section. Fig. 4 represents two variations in theconstruction of the frame. Fig. 5 is aview showing the principle ofconstruction of the jointed guide. Fig. 6 is a plan view of the guidedeveloped. Fig. 7 is a diagram illustrating the use of two, three, orfour angle-pieces and the forms assumed thereby.

The fabric-holder herein describedis formed of two rectangular frames,one being rigid and the other capable of extension, the twocorresponding sides of which are arranged in such a way as to tit inwith one another. It is composed of a rigid metal under frame A, the twoopposed edges a of which are flat and the two other edges b bent up nearthe top, and of a second upper extensible frame B, the two correspondingedges d d of which are arranged in such a way as to tit into the concavepart of the turned-up edges b of the up the pressure-screws e to causethe sidesd d of the same in separating one from the other to stretch thefabric and hold it rmly,

'the degree of extension of the upper frame being sufficient to allow ofthe employment of very thick fabrics and even of leather and othersupple materials.

Each of the fixed sides c c of the upper extensible frameB carries athin and flexible plate g, having, preferably, a toothed part soarranged that at the moment when the two frames approach one another theiiexible teeth of this plate force the fabric to stretch itself on thesmooth sides c a of the under frame. The extending of the frame may, ifdesired, as shown in' Fig. 4, be produced by means of blad e-springs j,attached to the extremities of the ixed sides c c of the upper frame Bor by means of eccentrics m or other mechanical equivalents.

The pantograph device or jointed guide which is capable of greatextension and, if desired, of adjustment, is mounted on a xed piece C,intended to be tted on a sewing-machine. This piece, as shown in Fig. 5,has three joints or pivot-points D E F', to which are connected two ormore angle-pieces G H of the jointed apparatus. The anglepieces G H,have, respectively, pivot-points D2 E2 F2 and D3 E3 F3, corresponding intheir relative positions exactly to the points D E F of the said supportC, and these three parts C G l-I are connected by means ofconnecting-rods D E F, the length of which is the same for each of theangle-pieces G and H, and care must be taken that the first of thesepieces G can fit (that is, coincide with, as regards its pivots) on thefixed supporting part C and that the second piece H can in its turn t onthe rst piece G. Further, the three pivot-points D E F of the supportcan be placed at any angle with respect to each IOO other, and it issufficient it the movable pieces G and I-I have a shapecorrespondingexactly to this angle. Similarly it will be understoodthat, theoretically speaking, the number of these angle-pieces can beincreased, as illustrated in Fig. 7, which shows a diagram and the formsthat the parts of the pantograph device should assume, according towhether two, three, or four angle-pieces are employed, each of thembearing the same relation to the succeeding one as the fixed support Cdoes to the iirst piece G.

The above described guiding apparatus has the following importantcharacteristicnamely, that while capable of traversing freely in everydirection, the pieces G and H remain always parallel to each other inany position they may occupy.

In the arrangement shown on the drawings the frame carrying the fabricis fixed by means of screws, bolts, or pins 7L h2 to the angle-piece H,and it is evident that if the tracing-point of the guide were fastenedto this piece H an embroidery would be obtained having the samedimensions as the model. In order, however, to obtain a reduction fromthe size of the model, three branches or levers M N P are fitted to theapparatus, arranged in the following manner: One of the rods D isprolonged outward to a certain extent and forms one of the principallevers M of the guide, the other lever N being jointed at the lower endD3 of the angle-piece H, and these two levers are connected bypivot-joints O O with an arm P, carrying the tracing-point p in such away as to form a guiding parallelogram or pantograph. Further, the tirstlever M could also be formed i by prolonging the intermediate or upperconmeeting-rod E, as shown in dotted lines marked M', or rod F, as shownin dotted lines marked M2, only in this case the second lever N must berespectively connected with the middle joint E3, as shown in dottedlines marked N', or the upper one F3, as shown in dotted lines markedN2, of the second angle-piece H. As

in this system of guide the relation between the distances traversed bythe embroideryframe and by the tracing-point is exactly proportionate totheir respective lever-arms, it suiiices, in order to obtain a givenamount of reduction to form in the principal levers M and N as well asin the pointer-arm P, a certain number of apertures O2 O2 for thepurpose of receiving the joint-pins O O of these three parts. It must,however, be noted that whatever position may be given to the pointer ortracer arm P, its length must always be such that its effective length Op shall equal thel length O D of the first lever M.

The total displacement of the embroideryframe, when regulated by thearrangement of jointed guide shown in Fig. 6, amounts to four times thelength of the connecting-piece D, E, or F, above named, and thedisplacement would amount to six times this length if three movableangle-pieces Were used, the reducing and supporting parallelograms beingarranged accordingly, and so on forany number of angle-pieces. Guidingdevices can thus be arranged of small dimensions, and consequentlylittle in the way, although they allow of a sufficiently-large surfacebeing embroidered without rendering it necessary to alter the positionof the fabric in the machine. It is obvious that the application ofthissort of jointed guide is not limited to therectangularembroidery-frame above described, but that it can be appliedequally Well to ordinary circular looms used for embroidery or to otherkinds of embroidery-frames.

I declare that what I claim is* l. The combination of the support C,having fixed pivots D E F', arranged as shown, the angle-piece G, havingpivots D2 E2 F2, corresponding to the pivots of the support, theangle-piece H, having pivots D3 E3 F3, corresponding to the pivots ofthe support, rods D, connecting the pivots D D2 D3, rods E, connectingthe pivots E E2 E3, rods F, connecting the pivots F' F2 F3, and thelevers M N, having arm P, substantially as described.

2. The combination of the xed support C, having pivots D E' F', arrangedas shown, the angle-piece G, having pivots D2 E2 F2, the angle-piece H,having pivots D3 E3 F3, rods D E F, levers M N, and arm P, substantiallyas described.

In testimony whereof I have signed my name to this specification in thepresence of t\vo subscribing witnesses.

MARTIN HENRI RUMPF.

lVitnesses:

EUGENE DUMAL, CHARLES BAILLY.

